Some people have attached ear lobes and some people have free ear lobes. the differences in these traits are caused by a. differences in personality. b. differences in genes. c. differences in diet. d. differences in environment.

THE ANSWER IS

B; differences in genes.

the answer for this question would be d. glaciers

affects the water bodies: excessive use of fertilizers causes eutrophication. the fertilizers which are used on plants affect the quality of land on which it is used, further causing erosion of soil. the fertilizers used on plants contain harmful chemical fumes which affect the environment.